Centrifugal blower

GRK 25/4 D

Article number: 0073.0308
Manufacturer: MAICO
Centrifugal blower made of plastic with rectangular exhaust opening, size 250, three-phase AC
Application examples: Industrial applications
Product data sheet
GRK 25/4 D IM0020613.PNG Centrifugal blower made of plastic with rectangular exhaust opening, size 250, three-phase AC
Back
  • On the notes
GRK 25/4 D

Characteristic curve

GRK 25/4 D - Characteristic curve

Dimensioned drawing

GRK 25/4 D - Dimensioned drawing [mm]

GRK 25/4 D - Dimensioned drawing Housing orientation [mm]

  1. RD Right-hand version
  2. LG Left-hand version

The GRK 12/2 E and GRK 12/4 D variants are not available in right-hand version RD!

The standard orientation is always LG 270°

Technical data

GRK 25/4 D - Technical data

Article GRK 25/4 D
Air flow volume 3.750 m³/h
Rotating speed 2.900 1/min
Impeller type radial
Speed controllable ✔
Reversing capacity −
Type of voltage Three-phase AC
Rated voltage 400 V
Frequency 50 Hz
Nominal output 1.100 W
Inom 3,2 A
Degree of protection IP 55
Insulation class F
Pole-changeable −
Installation site Duct connection
Installation position Horizontal
Housing material Plastic, polypropylene
Impeller material Plastic, polypropylene
Colour White
Weight 29 kg
Weight including packaging 32 kg
Size 250 mm
Width 513 mm
Height 590 mm
Depth 568 mm
Width with packaging 600 mm
Height with packaging 700 mm
Depth with packaging 700 mm
Airstream temperature at IMax 50 °C
PTC DIN 44082 M 100
Sound pressure level 65 dB
Packing unit 1 piece
Range C
GTIN (EAN) 4012799733089
Article number 0073.0308

Accessories

GRK 25/4 D - Accessories

Specific accessories

Product type Name Art. No. Price*(EUR) Action
Transition adapter URRI GR 25 0073.0313 on request
  • On the notes

General accessories

Product type Name Art. No. Price*(EUR) Action
Main switch, service switch HS 3 0157.0736 on request
  • On the notes
Machine protection relay thermistor TMS 0157.0992 on request
  • On the notes
Contactor US 16 T 0157.0769 on request
  • On the notes
Frequency converter MFU 4 0157.1216 on request
  • On the notes
Thermostat TH 10 0157.0764 on request
  • On the notes
Thermostat TH 16 0157.0748 on request
  • On the notes

Product description

Productdescription

GRK 25/4 D

short description

Centrifugal blower made of plastic with rectangular exhaust opening, size 250, three-phase AC

Product description

Features

  • Centrifugal blower with spiral housing made of plastic.
  • Powerful fans for industrial applications.
  • Suitable for conveying corrosive and acidic media.
  • For simple and direct mounting on a duct system.
  • Low noise level and high efficiency.
  • The motor is outside the air flow.
  • The plastic motor base for mounting the fan is included in the scope of delivery.
  • Housing made of plastic.
  • Standard orientation for LG 270° housing.
  • Suitable for temperature ranges up to 50 °C.
  • Centrifugal impellers with backward curved blades made of polypropylene.

Three-phase AC motor

  • Three-phase AC motor.
  • Protection class IP 55.
  • IE3 motor.
  • S1 operating mode (continuous operation).
  • Speed-controllable with frequency converter.
  • Permissible frequency range for speed control with frequency converter 20-50 Hz.
  • The temperature in the fan motor is monitored by PTC thermistors. The PTC thermistors must be connected to a release system, that permanently disconnects the fan from the power supply if the temperature is too high.

Electrical connection

  • Connection in the terminal box on the motor.

Special versions

  • The following special versions are available on request, at an extra cost:
    • Deviating housing orientation.
    • Version for explosion-proof areas.

Table of contents

Wiring diagram

GRK 25/4 D - Wiring diagram



Predecessor - successor

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